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Commit bf33cd55 authored by Zhijun He's avatar Zhijun He Committed by The Android Automerger
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Camera: Skip AE precapture when possible 

Skip AE precapture when AE is already converged for still capture use case. This
could save still capture latency 6-7 frame time for AE already converged case.

Bug: 10712902
Change-Id: Ie5512618b76e5d87c62c57c3d96d2004c604e29e
parent fa4247af

services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp

+12 −0
Original line number Diff line number Diff line
@@ -379,11 +379,23 @@ CaptureSequencer::CaptureState CaptureSequencer::manageStandardStart( 
        sp<Camera2Client> &client) {

    ATRACE_CALL();



    bool isAeConverged = false;

    // Get the onFrameAvailable callback when the requestID == mCaptureId

    client->registerFrameListener(mCaptureId, mCaptureId + 1,

            this);



    {

        Mutex::Autolock l(mInputMutex);

        isAeConverged = (mAEState == ANDROID_CONTROL_AE_STATE_CONVERGED);

    }



    {

        SharedParameters::Lock l(client->getParameters());

        // Skip AE precapture when it is already converged and not in force flash mode.

        if (l.mParameters.flashMode != Parameters::FLASH_MODE_ON && isAeConverged) {

            return STANDARD_CAPTURE;

        }



        mTriggerId = l.mParameters.precaptureTriggerCounter++;

    }

    client->getCameraDevice()->triggerPrecaptureMetering(mTriggerId);